General

  • Target

    731a22f17706d0391515076e9d6d34dc34f339e197fd2b623c8859bb0b2826b9

  • Size

    2.0MB

  • Sample

    240524-2xs5fseb61

  • MD5

    e9ebbc49a07bc54926507e3389dc19a4

  • SHA1

    183fdd0cb4cc0cfa97b44dcbf679aea8c7cb50ff

  • SHA256

    731a22f17706d0391515076e9d6d34dc34f339e197fd2b623c8859bb0b2826b9

  • SHA512

    cb09c15d8f5c3dfee63217bba59d78f201184cf7023a5b65638fd0b0472f7dda236236d7a9d76f70cb9a2b46b47692f7b7696a825ebc91da63349a58bc5abac4

  • SSDEEP

    49152:s4K3x1vUCJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18CtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      731a22f17706d0391515076e9d6d34dc34f339e197fd2b623c8859bb0b2826b9

    • Size

      2.0MB

    • MD5

      e9ebbc49a07bc54926507e3389dc19a4

    • SHA1

      183fdd0cb4cc0cfa97b44dcbf679aea8c7cb50ff

    • SHA256

      731a22f17706d0391515076e9d6d34dc34f339e197fd2b623c8859bb0b2826b9

    • SHA512

      cb09c15d8f5c3dfee63217bba59d78f201184cf7023a5b65638fd0b0472f7dda236236d7a9d76f70cb9a2b46b47692f7b7696a825ebc91da63349a58bc5abac4

    • SSDEEP

      49152:s4K3x1vUCJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18CtIuoITsdZ

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks